Yoshiaki Umegaki is a Japanese actor born on July 12, 1959, in Kasaoka, Okayama Prefecture, Japan. He is known primarily as a live-action film and television actor who has also taken on select voice acting roles in anime productions. Umegaki stands 178 cm tall and attended Kyoto Sangyo University before discontinuing his studies there.

Umegaki began his career in the entertainment industry during the 1990s, with early work including appearances in television dramas such as the NHK period piece Hideyoshi (1996) and the Fuji Television series Africa no Yoru wa Akenai (1999). In the mid-1990s, he took on one of his notable voice roles as Golden Man in the anime series Weather Woman (1996).

His most prominent and widely recognized voice performance came in 2003 when he voiced the character Hana in director Satoshi Kon's acclaimed animated film Tokyo Godfathers. In this film, which follows three homeless individuals trying to return an abandoned baby to its parents, Umegaki provides the voice of Hana, an aging and sentimental former drag queen who serves as the maternal figure of the makeshift family. The cast for Tokyo Godfathers was assembled primarily from live-action actors rather than dedicated voice actors, with Umegaki starring alongside Toru Emori and Aya Okamoto. The film was produced by the animation studio Madhouse, received the Excellence Award at the 2003 Japan Media Arts Festival, and won Best Animation Film at the 58th Mainichi Film Awards.